/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */ /* * This file is part of the LibreOffice project. * * This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ #include "config.h" #include #include "Ssl.hpp" #include #include "Util.hpp" extern "C" { // Multithreading support for OpenSSL. // Not needed in recent (1.x?) versions. struct CRYPTO_dynlock_value { std::mutex Mutex; }; } std::unique_ptr SslContext::Instance(nullptr); SslContext::SslContext(const std::string& certFilePath, const std::string& keyFilePath, const std::string& caFilePath) : _ctx(nullptr) { const std::vector rand = Util::rng::getBytes(512); RAND_seed(&rand[0], rand.size()); // Initialize multi-threading support. for (int x = 0; x < CRYPTO_num_locks(); ++x) { _mutexes.emplace_back(new std::mutex); } #if OPENSSL_VERSION_NUMBER >= 0x0907000L OPENSSL_config(nullptr); #endif SSL_library_init(); SSL_load_error_strings(); OpenSSL_add_all_algorithms(); CRYPTO_set_locking_callback(&SslContext::lock); CRYPTO_set_id_callback(&SslContext::id); CRYPTO_set_dynlock_create_callback(&SslContext::dynlockCreate); CRYPTO_set_dynlock_lock_callback(&SslContext::dynlock); CRYPTO_set_dynlock_destroy_callback(&SslContext::dynlockDestroy); // Create the Context. We only have one, // as we don't expect/support different servers in same process. #if OPENSSL_VERSION_NUMBER >= 0x10100000L _ctx = SSL_CTX_new(TLS_server_method()); #else _ctx = SSL_CTX_new(SSLv23_server_method()); #endif // SSL_CTX_set_default_passwd_cb(_ctx, &privateKeyPassphraseCallback); ERR_clear_error(); SSL_CTX_set_options(_ctx, SSL_OP_ALL); try { int errCode = 0; if (!caFilePath.empty()) { errCode = SSL_CTX_load_verify_locations(_ctx, caFilePath.c_str(), 0); if (errCode != 1) { std::string msg = getLastErrorMsg(); throw std::runtime_error(std::string("Cannot load CA file/directory at ") + caFilePath + " (" + msg + ")"); } } if (!keyFilePath.empty()) { errCode = SSL_CTX_use_PrivateKey_file(_ctx, keyFilePath.c_str(), SSL_FILETYPE_PEM); if (errCode != 1) { std::string msg = getLastErrorMsg(); throw std::runtime_error(std::string("Error loading private key from file ") + keyFilePath + " (" + msg + ")"); } } if (!certFilePath.empty()) { errCode = SSL_CTX_use_certificate_chain_file(_ctx, certFilePath.c_str()); if (errCode != 1) { std::string msg = getLastErrorMsg(); throw std::runtime_error(std::string("Error loading certificate from file ") + certFilePath + " (" + msg + ")"); } } SSL_CTX_set_verify(_ctx, SSL_VERIFY_NONE, nullptr /*&verifyServerCallback*/); SSL_CTX_set_cipher_list(_ctx, "ALL:!ADH:!LOW:!EXP:!MD5:@STRENGTH"); SSL_CTX_set_verify_depth(_ctx, 9); // The write buffer may re-allocate, and we don't mind partial writes. SSL_CTX_set_mode(_ctx, SSL_MODE_ENABLE_PARTIAL_WRITE | SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER); SSL_CTX_set_session_cache_mode(_ctx, SSL_SESS_CACHE_OFF); initDH(); initECDH(); } catch (...) { SSL_CTX_free(_ctx); _ctx = nullptr; throw; } } SslContext::~SslContext() { EVP_cleanup(); ERR_free_strings(); CRYPTO_set_locking_callback(0); CRYPTO_set_id_callback(0); CONF_modules_free(); _mutexes.clear(); } void SslContext::uninitialize() { assert (Instance); Instance.reset(); } void SslContext::lock(int mode, int n, const char* /*file*/, int /*line*/) { assert(n < CRYPTO_num_locks()); if (Instance) { if (mode & CRYPTO_LOCK) { Instance->_mutexes[n]->lock(); } else { Instance->_mutexes[n]->unlock(); } } } unsigned long SslContext::id() { return syscall(SYS_gettid); } CRYPTO_dynlock_value* SslContext::dynlockCreate(const char* /*file*/, int /*line*/) { return new CRYPTO_dynlock_value; } void SslContext::dynlock(int mode, struct CRYPTO_dynlock_value* lock, const char* /*file*/, int /*line*/) { if (mode & CRYPTO_LOCK) { lock->Mutex.lock(); } else { lock->Mutex.unlock(); } } void SslContext::dynlockDestroy(struct CRYPTO_dynlock_value* lock, const char* /*file*/, int /*line*/) { delete lock; } void SslContext::initDH() { #ifndef OPENSSL_NO_DH // 1024-bit MODP Group with 160-bit prime order subgroup (RFC5114) // -----BEGIN DH PARAMETERS----- // MIIBDAKBgQCxC4+WoIDgHd6S3l6uXVTsUsmfvPsGo8aaap3KUtI7YWBz4oZ1oj0Y // mDjvHi7mUsAT7LSuqQYRIySXXDzUm4O/rMvdfZDEvXCYSI6cIZpzck7/1vrlZEc4 // +qMaT/VbzMChUa9fDci0vUW/N982XBpl5oz9p21NpwjfH7K8LkpDcQKBgQCk0cvV // w/00EmdlpELvuZkF+BBN0lisUH/WQGz/FCZtMSZv6h5cQVZLd35pD1UE8hMWAhe0 // sBuIal6RVH+eJ0n01/vX07mpLuGQnQ0iY/gKdqaiTAh6CR9THb8KAWm2oorWYqTR // jnOvoy13nVkY0IvIhY9Nzvl8KiSFXm7rIrOy5QICAKA= // -----END DH PARAMETERS----- // static const unsigned char dh1024_p[] = { 0xB1,0x0B,0x8F,0x96,0xA0,0x80,0xE0,0x1D,0xDE,0x92,0xDE,0x5E, 0xAE,0x5D,0x54,0xEC,0x52,0xC9,0x9F,0xBC,0xFB,0x06,0xA3,0xC6, 0x9A,0x6A,0x9D,0xCA,0x52,0xD2,0x3B,0x61,0x60,0x73,0xE2,0x86, 0x75,0xA2,0x3D,0x18,0x98,0x38,0xEF,0x1E,0x2E,0xE6,0x52,0xC0, 0x13,0xEC,0xB4,0xAE,0xA9,0x06,0x11,0x23,0x24,0x97,0x5C,0x3C, 0xD4,0x9B,0x83,0xBF,0xAC,0xCB,0xDD,0x7D,0x90,0xC4,0xBD,0x70, 0x98,0x48,0x8E,0x9C,0x21,0x9A,0x73,0x72,0x4E,0xFF,0xD6,0xFA, 0xE5,0x64,0x47,0x38,0xFA,0xA3,0x1A,0x4F,0xF5,0x5B,0xCC,0xC0, 0xA1,0x51,0xAF,0x5F,0x0D,0xC8,0xB4,0xBD,0x45,0xBF,0x37,0xDF, 0x36,0x5C,0x1A,0x65,0xE6,0x8C,0xFD,0xA7,0x6D,0x4D,0xA7,0x08, 0xDF,0x1F,0xB2,0xBC,0x2E,0x4A,0x43,0x71, }; static const unsigned char dh1024_g[] = { 0xA4,0xD1,0xCB,0xD5,0xC3,0xFD,0x34,0x12,0x67,0x65,0xA4,0x42, 0xEF,0xB9,0x99,0x05,0xF8,0x10,0x4D,0xD2,0x58,0xAC,0x50,0x7F, 0xD6,0x40,0x6C,0xFF,0x14,0x26,0x6D,0x31,0x26,0x6F,0xEA,0x1E, 0x5C,0x41,0x56,0x4B,0x77,0x7E,0x69,0x0F,0x55,0x04,0xF2,0x13, 0x16,0x02,0x17,0xB4,0xB0,0x1B,0x88,0x6A,0x5E,0x91,0x54,0x7F, 0x9E,0x27,0x49,0xF4,0xD7,0xFB,0xD7,0xD3,0xB9,0xA9,0x2E,0xE1, 0x90,0x9D,0x0D,0x22,0x63,0xF8,0x0A,0x76,0xA6,0xA2,0x4C,0x08, 0x7A,0x09,0x1F,0x53,0x1D,0xBF,0x0A,0x01,0x69,0xB6,0xA2,0x8A, 0xD6,0x62,0xA4,0xD1,0x8E,0x73,0xAF,0xA3,0x2D,0x77,0x9D,0x59, 0x18,0xD0,0x8B,0xC8,0x85,0x8F,0x4D,0xCE,0xF9,0x7C,0x2A,0x24, 0x85,0x5E,0x6E,0xEB,0x22,0xB3,0xB2,0xE5, }; DH* dh = DH_new(); if (!dh) { std::string msg = getLastErrorMsg(); throw std::runtime_error("Error creating Diffie-Hellman parameters: " + msg); } dh->p = BN_bin2bn(dh1024_p, sizeof(dh1024_p), 0); dh->g = BN_bin2bn(dh1024_g, sizeof(dh1024_g), 0); dh->length = 160; if ((!dh->p) || (!dh->g)) { DH_free(dh); throw std::runtime_error("Error creating Diffie-Hellman parameters"); } SSL_CTX_set_tmp_dh(_ctx, dh); SSL_CTX_set_options(_ctx, SSL_OP_SINGLE_DH_USE); DH_free(dh); #endif } void SslContext::initECDH() { #if OPENSSL_VERSION_NUMBER >= 0x0090800fL #ifndef OPENSSL_NO_ECDH const int nid = OBJ_sn2nid("prime256v1"); if (nid == 0) { throw std::runtime_error("Unknown ECDH curve name: prime256v1"); } EC_KEY* ecdh = EC_KEY_new_by_curve_name(nid); if (!ecdh) { throw std::runtime_error("Cannot create ECDH curve"); } SSL_CTX_set_tmp_ecdh(_ctx, ecdh); SSL_CTX_set_options(_ctx, SSL_OP_SINGLE_ECDH_USE); EC_KEY_free(ecdh); #endif #endif } std::string SslContext::getLastErrorMsg() { const unsigned long errCode = ERR_get_error(); if (errCode != 0) { char buf[256]; ERR_error_string_n(errCode, buf, sizeof(buf)); return std::string(buf); } return "Success"; } /* vim:set shiftwidth=4 softtabstop=4 expandtab: */